Toggle lever clamping device
OwnerLuciano Miglioriinventor
Life of this patent
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Abstract
A toggle lever clamping device for clamping a workpiece to a support frame; the clamping device comprises a box-shaped head to which a clamping arm is pivoted to rotate between an open and a closed condition to release respectively to lock the workpiece; the clamping arm is operatively connected to an actuator by a toggle lever mechanism having a dead center condition beyond which the clamping arm is tightened against the workpiece. The toggle mechanism comprises an elastically yieldable connection link which, upon reaching the dead center of the toggle lever mechanism is sequentially allowed to axially yield for a some degree and to deflect in a controlled mode by confronting stop means provided on the same clamping arm.
Claims16
A toggle lever clamping device for tightening workpieces to a support frame, comprising:
- a box-shaped head having a longitudinal axis;
- a clamping arm pivotally connected at one end of the box-shaped head to rotate between open and closed conditions to lock respectively to release the workpiece;
- a linear actuator at the other end of the box-shaped head;
- and
- a toggle lever mechanism operatively connected between the actuator and the clamping arm;
- said toggle lever mechanism comprising an elastically yieldable connection link having a longitudinal axis extending between hinging ends, said toggle lever mechanism having a dead centre condition beyond which the connection link maintains the clamping arm tightened against the workpiece,
- wherein said elastically yieldable connection link comprises spaced apart stop means arranged to prevent an axial compression of the connection link upon reaching and overcoming said dead centre condition of the toggle lever mechanism.
Dependencies are inferred from the claim text.